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/*
* Copyright (C) 2018 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "LayoutContainerBox.h"
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
#include "RenderStyle.h"
#include <wtf/IsoMallocInlines.h>
namespace WebCore {
namespace Layout {
WTF_MAKE_ISO_ALLOCATED_IMPL(ContainerBox);
ContainerBox::ContainerBox(std::optional<ElementAttributes> attributes, RenderStyle&& style, std::unique_ptr<RenderStyle>&& firstLineStyle, OptionSet<BaseTypeFlag> baseTypeFlags)
: Box(attributes, WTFMove(style), WTFMove(firstLineStyle), baseTypeFlags | ContainerBoxFlag)
{
}
ContainerBox::~ContainerBox()
{
destroyChildren();
}
const Box* ContainerBox::firstInFlowChild() const
{
if (auto* firstChild = this->firstChild()) {
if (firstChild->isInFlow())
return firstChild;
return firstChild->nextInFlowSibling();
}
return nullptr;
}
const Box* ContainerBox::firstInFlowOrFloatingChild() const
{
if (auto* firstChild = this->firstChild()) {
if (firstChild->isInFlow() || firstChild->isFloatingPositioned())
return firstChild;
return firstChild->nextInFlowOrFloatingSibling();
}
return nullptr;
}
const Box* ContainerBox::lastInFlowChild() const
{
if (auto* lastChild = this->lastChild()) {
if (lastChild->isInFlow())
return lastChild;
return lastChild->previousInFlowSibling();
}
return nullptr;
}
const Box* ContainerBox::lastInFlowOrFloatingChild() const
{
if (auto* lastChild = this->lastChild()) {
if (lastChild->isInFlow() || lastChild->isFloatingPositioned())
return lastChild;
return lastChild->previousInFlowOrFloatingSibling();
}
return nullptr;
}
void ContainerBox::appendChild(UniqueRef<Box> childRef)
{
auto childBox = childRef.moveToUniquePtr();
childBox->setParent(this);
if (m_lastChild) {
m_lastChild->setNextSibling(childBox.get());
childBox->setPreviousSibling(m_lastChild.get());
} else
m_firstChild = childBox.get();
// Ownership has been transferred.
m_lastChild = childBox.release();
}
void ContainerBox::destroyChildren()
{
std::unique_ptr<Box> childToDestroy { m_firstChild.get() };
m_firstChild = nullptr;
m_lastChild = nullptr;
while (childToDestroy) {
childToDestroy->setParent(nullptr);
std::unique_ptr<Box> nextSibling { childToDestroy->nextSibling() };
if (nextSibling) {
childToDestroy->setNextSibling(nullptr);
nextSibling->setPreviousSibling(nullptr);
}
childToDestroy = WTFMove(nextSibling);
}
}
}
}
#endif
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